![]() ![]() download code sample view demo download free word pdf excel api in this article i will explain a tutorial to use the asp.net treeview control in asp.net with examples in c# and vb.net. Asp.net sql server treeview here mudassar ahmed khan has explained a tutorial to use the asp.net treeview control in asp.net with examples in c# and vb.net. on the treeview tasks menu, in the choose data source drop down list, select new data source. right click the treeview control, and then click show smart tag. in the toolbox, from the navigation group, drag a treeview control onto the page. Open the default.aspx page, and then switch to design view. ![]() step 4 now drag and drop a treeviewcontrol from the toolbox. step 3 open solution explorer then add a webform and give it a name such as "treeview.aspx". step 2 add an asp.net web forms application and give it the name treeviewcontrol. Step 1 open microsoft visual studio then select "file" > "new" > "project " (ctrl shift n). treeview application the application solution contains a single windows application project. figure 4: creating a node with specific properties. figure 3: searching a treeview control by the name property. figure 2: searching a treeview control by the name property. "data" : will go through the Json data and create a ul structure from it and put that into the div.Figure 1: searching a treeview control by the text property. Then in your view, you simply need one div that holds the tree: Īnd this javascript that will populate it: ViewBag.Json = JsonSerializer.Serialize(nodes) Parent = item.ParentId = null ? "#" : (), First retrieve your data from the db into a List of items, no sorting is required. I am working in ASP.Net Core 3.1, so I use to serialize the data. Here's my code that loads the data into a List. First, the model that holds each node's data: public class JsTreeModel I found I didn't need TreeCollections at all. Update: I was able to load and display a hierarchical tree on my web page with very little code, using jsTree. If you want to pre-load your data into a tree structure first, like I am doing with TreeCollections, then perhaps populating a structure will work, but it will still need help with javascript if you want to interactively show/hide branches on the tree. There are two good lazy-load implementations of JSTree on SO here: Lazy-loading TreeView with JsTree in Asp.Net MVCĭepending on the size and depth of your tree, if you can pull your data dynamically as the user navigates the tree, this might be the best solution. I think we will have to use at least some javascript. You mention JsTree, and I think that is a viable option, but it's not html-only as you specified. Now to display the data on a web page, I don't think Microsoft has any tools to help us. You might want to look at that for your tree data structure. ![]() I have implemented that and can successfully build one or multiple hierarchical trees from my data. ![]() I have also looked at Telerik and Syncfusion, but am trying to avoid paying for a solution.įirst, for the data structure, I did find a NuGet package called TreeCollections written by David West here: You are right, there is a TreeView for ASP.NET Core, but it's for Windows Forms and not web pages: Tony, I have been searching for the same thing also. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |